Reply by NiteWalker

I used to use TBIII exclusively, mainly for the open time and lower working temp.
Since I do my glueups indoors now, and since open time hasn’t really been an issue, I use TBII now. It works great and costs less. I don’t bother with TBI because TBII is only pennies more and has the additional benefit of being water resistant.

-- He who dies with the most tools... dies with the emptiest wallet.